Thermo-mechanical Performance Of the Thermal Barrier Coated Piston

Abstract

Analysis of the performance of thermal barrier coated (TBC) pistons is important for the design of adiabatic engine. The performance of the TBC piston with thermal load, mechanical load and thermo-mechanical load has been analysed using the cell-vertex finite volume method. Compared to the ordinary piston, TBC piston body withstands less thermal load and exists smaller stress and deformation, while the stress distribution is similar. The maximum stress exists in the TBC region, followed by the region around the pin boss. TBC isolated most heat to the piston body and bears large thermal load. The interface between the bonding layer and the ceramic layer has the most serious stress level. Due to the adoption of TBC, the stress on the piston fire shore arises, while the stress around the piston ring groove area decreases. The area around the pin boss exists the second stress level caused by both thermal and mechanical loads.